package extendsexamp;

public class PrinterTest {
    public static void main(String[] args) {
        HPPrinter hp=new HPPrinter();
        hp.open();
        hp.print();
        hp.close();

        CanonPrinter canonPrinter=new CanonPrinter();
        canonPrinter.open();
        canonPrinter.print();
        canonPrinter.close();

    }
}
